使用 Toad 时出现无效的脚本错误

Question

我正在尝试为存储过程开发 SQL 语句，它将为我提供我将使用变量 (@repeated) 指定的计数。

我正在为 MySQL 使用 Toad，但我不断收到语法错误（描述性不强）。这是我的 SQL:

DECLARE @repeated INT DEFAULT 1;
DECLARE @mailingmonth DATE;

SET @mailingmonth = '2015-10-01';

WHILE @repeated < 12 DO
SELECT A.LoanNumber, Repeated FROM MKT_Mailing_Hist A 
 INNER JOIN (SELECT LoanNumber, COUNT(*) As Repeated
             FROM MKT_Mailing_Hist B
             WHERE MailingMonth <= @mailingmonth
             GROUP BY LoanNumber) AS Months ON A.LoanNumber = Months.LoanNumber
 WHERE A.MailingMonth = @mailingmonth
 AND Repeated = @repeated
 SET @repeated = @repeated + 1;
 END WHILE;
 END;

我认为此语法可能存在几个问题，但我一直在进行更改，但似乎没有任何效果。

更新

我想将类似的代码封装在带参数的存储过程中，以便我可以更改参数以满足我的需要。这是我的：

DELIMITER $$

CREATE procedure sp_MKT_Counts_Test2 (vRepeated INT, vMailingmonth DATE)
BEGIN

WHILE vRepeated < 12 DO
SELECT COUNT(A.LoanNumber) FROM MKT_Mailing_Hist A 
 INNER JOIN (SELECT LoanNumber, COUNT(*) As Repeated
             FROM MKT_Mailing_Hist B
             WHERE MailingMonth <= vMailingmonth
             GROUP BY LoanNumber) AS Months ON A.LoanNumber = Months.LoanNumber
 WHERE A.MailingMonth = vMailingmonth
 AND Repeated = vRepeated;
 SET vRepeated = vRepeated + 1;
 END WHILE;
  END;
 $$
 DELIMITER ;

但是，当我用这两个参数调用存储过程时，我只是得到一条消息，通知我语句执行成功，但我没有得到结果集。为什么没有结果集？我需要输出参数吗？

Answer 1

这将使您克服语法错误：

DELIMITER $$
create procedure myProc876()
BEGIN

DECLARE vRepeated INT DEFAULT 1;
DECLARE vMailingmonth DATE;

SET vMailingmonth = '2015-10-01';

WHILE vRepeated < 12 DO
SELECT A.LoanNumber, Repeated FROM MKT_Mailing_Hist A 
 INNER JOIN (SELECT LoanNumber, COUNT(*) As Repeated
             FROM MKT_Mailing_Hist B
             WHERE MailingMonth <= mailingmonth
             GROUP BY LoanNumber) AS Months ON A.LoanNumber = Months.LoanNumber
 WHERE A.MailingMonth = vMailingmonth
 AND Repeated = vRepeated;
 SET vRepeated = vRepeated + 1;
 END WHILE;
 END;
 $$
 DELIMITER ;

它有一个WHILE DO，更改了一些变量名，并用DELIMITER 包裹起来。定界符很重要，否则找到的第一个分号将结束一切。所以 $$ 包裹了整个东西。然后将用户会话分隔符设置回分号。

请注意，您的 AND Repeated = @repeated 最后也没有半决赛

Delimiters 对于存储过程以及创建事件和触发器很重要。

使用 Toad 时出现无效的脚本错误

Invalid Script Error using Toad

mysql

variables

syntax

toad

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